1. Revolution: This is the movement of a planet around the Sun in an elliptical orbit. This is what we typically think of when we talk about a planet's "orbit." The time it takes a planet to complete one full revolution around the Sun is called its orbital period.

2. Rotation: This is the spinning of a planet on its axis. The time it takes a planet to complete one full rotation is called its day.

These two motions, revolution and rotation, are what create the cycles we experience on Earth, like days, nights, and seasons.